GB543159A - Improvements relating to apparatus for fusing silica - Google Patents
Improvements relating to apparatus for fusing silicaInfo
- Publication number
- GB543159A GB543159A GB15529/40A GB1552940A GB543159A GB 543159 A GB543159 A GB 543159A GB 15529/40 A GB15529/40 A GB 15529/40A GB 1552940 A GB1552940 A GB 1552940A GB 543159 A GB543159 A GB 543159A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crucible
- silica
- beryllia
- zirconia
- oct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
- C03B5/033—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by using resistance heaters above or in the glass bath, i.e. by indirect resistance heating
- C03B5/0334—Pot furnaces; Core furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B15/00—Drawing glass upwardly from the melt
- C03B15/14—Drawing tubes, cylinders, or rods from the melt
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/04—Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Silicon Compounds (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
543,159. Electric furnace. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 21, 1940, No. 15529. Convention date, Oct. 21, 1939. [Class 39 (iii)] [Also in Group XXIII] Apparatus for fusing silica in vacuo comprises a container 3 which can be hermetically sealed, carbonaceous resistance heaters 10 arranged therein and surrounded by a porous mass 12 of zirconia or beryllia, a crucible 6, also a compound of zirconia or beryllia, placed in the fusion space within the porous mass, and means for evacuating gas from the furnace. The packing 12 is surrounded and supported by a cylinder 13 of refractory material, the space between the cylinder and the container being filled with a second packing 14 of refractory material to serve as heat insulation. The charge of silica 9, after being. fused, may be allowed to cool and be removed as an ingot, or the fused mass may be formed into tubes and rods. This may be effected by drawing the fusion upwards through the top of the crucible or by extruding it downwards by air pressure, through an opening in the bottom of the crucible. In either case, a core tube is used to admit air to the bore of the tubing when tube is being drawn. Specifications 375,500 and 450,927, [both in Group XXIII], are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US543159XA | 1939-10-21 | 1939-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB543159A true GB543159A (en) | 1942-02-12 |
Family
ID=21990215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15529/40A Expired GB543159A (en) | 1939-10-21 | 1940-10-21 | Improvements relating to apparatus for fusing silica |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB543159A (en) |
-
1940
- 1940-10-21 GB GB15529/40A patent/GB543159A/en not_active Expired
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